[piokuc]

That's a very good question. I asked this question at a dinner after European Common Lisp Meeting in Madrid in 2013, a wonderful, memorable gig, BTW. I was surprised how unanimous CL elites were on this subject. They were strongly against even small, incremental improvements or additions. IMHO, it would be nice to have a standard socket library, for example. One of the reasons mentioned was cost of the standardization, including updates of all the implementations. I kind of understand it, but, on the other hand, it makes me a bit sad. Things either grow, even very slowly, or become fossil.